1) Is it normal to not hear much (or any??) difference when changing out preamps or amps assuming the components in question are within similar specs?
Yes. Most will probably not detect a clear difference. THe ear has to adapt and be trained over time to detect subtle differences. Some might never hear much difference of any concern.
2) Has anyone else purchased relatively expensive amp/preamp combinations even when you believe the components are not making a difference in the sound quality?
I'm sure many have but I have not. I only spend more when I can see a clear reason to. How to know? That is a product of technical knowledge that can be accumulated over time. I do listen to good or expensive setups whenever possible in order to help train my ears and determine what represents good reference sound for me.
3) Placement and angle of my speakers in my room make almost as much of a difference as the brand and model of the speaker - at least to me. Anyone else have this experience?
Yes, yes, and yes. This is a major factor in determining the sound you hear and is one of teh most inexpensive and worthwhile tweaks one can apply with diligence.
4) What am I doing wrong that is leading to not hearing a difference?
Assuming you have good/normal hearing, probably nothing. I suspect this is something that may come over time. The other possibility is that the differences between the things you are comparing are subtle and not as clear as other comparisons might be. Try comparing a low power SS or tube amp versus a high power SS amp 80 watts or more. You should hear a difference. Try a tube DAC versus a SS or roll tubes in the tube DAC. I would expect most with trained ears will hear some difference.
The other possibility is that you hear the differences but they are not significant enough to matter to you. Nothing wrong with that. I suspect that over time though most will converge on some preferred sound though others might still be enjoyable to some extent.
Yes. Most will probably not detect a clear difference. THe ear has to adapt and be trained over time to detect subtle differences. Some might never hear much difference of any concern.
2) Has anyone else purchased relatively expensive amp/preamp combinations even when you believe the components are not making a difference in the sound quality?
I'm sure many have but I have not. I only spend more when I can see a clear reason to. How to know? That is a product of technical knowledge that can be accumulated over time. I do listen to good or expensive setups whenever possible in order to help train my ears and determine what represents good reference sound for me.
3) Placement and angle of my speakers in my room make almost as much of a difference as the brand and model of the speaker - at least to me. Anyone else have this experience?
Yes, yes, and yes. This is a major factor in determining the sound you hear and is one of teh most inexpensive and worthwhile tweaks one can apply with diligence.
4) What am I doing wrong that is leading to not hearing a difference?
Assuming you have good/normal hearing, probably nothing. I suspect this is something that may come over time. The other possibility is that the differences between the things you are comparing are subtle and not as clear as other comparisons might be. Try comparing a low power SS or tube amp versus a high power SS amp 80 watts or more. You should hear a difference. Try a tube DAC versus a SS or roll tubes in the tube DAC. I would expect most with trained ears will hear some difference.
The other possibility is that you hear the differences but they are not significant enough to matter to you. Nothing wrong with that. I suspect that over time though most will converge on some preferred sound though others might still be enjoyable to some extent.
